Ball screw is the part used in machines to move the axes that need to be moved. The distance it takes in a round varies according to the pitch width. Converts radial force to linear force.
You can calculate torque or force with the formulas below.
Force = Torque x 2*3,14/Lead
Torque = Force x Lead /(2*3,14)
With the rapid development of technology, the need for precise and fast production is increasing day by day. To achieve this speed and precision, it is necessary to use advanced technology products in the movement axes of the machines.
Today, the main axis drive systems used in machines are as follows.
1- Belt – Pulley
2- Screw Shaft
3- Rack-Pinion
4-Chain Gear
Moving the load with the ball screw enabled the machines to be able to position very precisely.
Ball screw production is a process that requires high precision.Many manufacturers have transferred almost a hundred years of metal machining experience to ball screw production.However, there are companies that have started this business recently.Especially new companies have lower budgets, so they choose custom ball screw production.As it is known, screw shaft types have classes such as C0, C1, C3, C5, C7, C8 and C10 (also indicated by the letter T) according to their production quality.These classes give information about whether ball screws are of ground type or rolled type.
Ball Screw is a feed screw that turns the radial motion into linear motion by making a rolling motion between the screw’s ball channel and the nut’s ball recirculaiton channel.The reason for using it instead of trapezoidal shaft is high efficiency. Due to the ball between the nut and the shaft, the friction effect is less compared to the trapezoidal shaft.
Screw shafts are divided into two according to the way they are manufactured.
Today, we are going to learn basic knowledge of how to choose products for horizontal linear axis. Imagine that, this calculation can be Y axis of cnc router or X axis of big 3D printer.
I’m using Yaskawa SigmaJunmaSize+ and THK Life Calculator applications.
Suppose we have a 2000 kg load for the axis that will work horizontally. Let’s consider it as 4 linear guides-2 rails, and the ball screw as the drive element.
The values we want to achieve in the sample application are as shown below.
Max speed: 250mm/sec
Stroke : 2000mm